Phrase guide

Lychrel number

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A natural number that cannot form a palindrome through the iterative process of repeatedly reversing its digits and adding the resulting numbers.

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, sciences

Examples

  • In base ten (decimal), no Lychrel numbers have been yet proved to exist, but many are suspected.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Coined by Wade Van Landingham as a rough anagram of Cheryl, his girlfriend's first name.